This will be our second year for this event, and for those that wish to bring the family, kids, or friends, it's a great time to do something in the park, see some new areas, (last year, sections that are normally closed were opened up), use your trail skills along with gps.

Entrance to the park is free for this event
Lunch is supplied free
And when done for the day, there will be a raffle, with lots and lots of prizes.

Last year:

the big prize was a GPS

annual pass to ALL of California State Parks

Off road gear

I won a annual pass to the park

So if your looking for something to do, in addition to driving off road, check it out.

You will not need any modifications just the ability to drive the trails

I'm interested but depends if my other planned trip falls through which is the same weekend.

I too need to play around with my setup more. I have a Globalsat BT-359 which I'm running with my Nexus 10. The GPS receiver seemed to work well when I used to use it with my 1st gen iPad through the Mojave Desert. But then again I used it more for tracking our trip rather than for geocaching. Right now I'm playing around with multiple apps to see which works best. Do you have any recommendations?

I use and recommend Garmin, but any of the major players is nice. Usually it's Magellan, Garmin, or Delorme.

Also picking one up at REI is sweet, because they have a no questions asked return policy. No restock fee, and it you join, a rebate at the end of the year.

One thing we do is scan or download area off road maps, overlay on Google Earth, stretch and fit the ovely to match, then save the file to load in our gps. Then you have a map of where your playing off road, and with the gps, know where your at. Nice when in the desert, or even out and about.

Anyone that wishes to drive around Holister Hills for free, get a free lunch, win some prizes, have a grown up easter egg type hunt, and get to go in part of the park not usually open to the general poplulation. There will be nothing that a stock 4 wheel drive can't do, and for some there will be a few challenging ones.

The main focus is using your gps to locate caches, answer some questions to get credit for the find, and put it back for the next person. Not a race, not a go blasting off the hills there will be kids, families, and lots of rangers to provide some local knowledge about the fault zone, plants and animals.